Why does my thermostat setting not match my home’s temperature?

The thermostat is a temperature regulation device that detects the thermal level in a particular physical system and maintains the climate at the ideal setpoint. It is used in several devices for heating, central heating, and air conditioning purposes plus in kitchen equipment. But what if you set the home’s temperature at 20°C but note some other reading? I guess it’s uncomfortable. This situation often happens when there is an issue with the thermostat or it’s not working properly. 

Why Does My Thermostat Setting Not Match My Home’s Temperature?


Like every other problem, you can solve this issue of improper temperature management by taking some steps in the following article. We have tried our best to introduce you to why does my thermostat setting not match my home’s temperature? There are a few possible reasons for this issue like dirt collection, unlived electricity, devices faulty calibration, or wiring. Well, we will discuss all these issues in this post along with discussing other related data–keep reading until the end. 

Here Are A Few Reasons Why Your Thermostat Setting Does Not Match My Home’s Temperature?

Check the surroundings: As I mentioned earlier, the thermostat detects the temperature and tries to maintain it according to your ideal set point. So, make sure it isn’t under direct sunlight or near a fireplace since these may influence the thermostat to take a wrong temperature detection reading. In addition, ensure to keep the thermostat on the inside of the house away from doors or windows with sunlight. 

Examine The Power: No doubt, a thermostat needs some power to work and do its job as expected. In some cases, many thermostats use batteries to get power but these often die making the thermostat unable to work so the room temperature doesn’t match the thermostat setting. So, make sure to check the batteries and if they are dead, replace these and solve the issue. 

Inspect The Filter: There is a filter in the thermostat that filters the air coming through the furnace. The air is the only way to detect that temperature. If the filter is clogged with dust, there are some chances of improper airflow and ultimately, invalid temperature readings. Replace the filter and then wait for the thermostat to return to the right condition–move to the next step if it’s still not working. 

Reasons For Thermostat Improper Working

Clean The Thermostat

There is a faceplate on the front of possibly every thermostat that not only provides safety to the device but also has some buttons to perform various operations. Most of the time, dust traps within the thermostat in the back of this plate can cause some issues. The rule of thumb is to remove this plate carefully and clean out the dust with the help of a soft rag or compressed air. Also, make sure to tighten and secure the wire if any of them is loose. 

You may think that the job is completed but wait, it’s not. As I mentioned earlier, there is a sensor within the thermostat to detect the temperature and perform the cooling operations. Removing the dust from the inside of the thermostat also helps in the overall performance of this sensor. But if the sensing problem is still there despite cleaning the sensor, chances are that it is not working and needs a professional technician to replace it. 

Play With Leveling

If you have an older model of the thermostat, chances are it’s malfunctioning due to its uneven position. Take the example of the mechanical thermostats that use a mercury switch and bimetal springs to function. These elements need to lay vertically inside the device to operate and adjust the temperature properly. But what if these are not leveled horizontally? Well, in this condition, you have to face some improper thermal issues. 

You can level the elements inside the thermostat in two ways. First, check whether the device is mounted properly to the wall or not. If this isn’t mounted as it should be, ensure that the backplate is squared to the wall. In contrast, you can follow the other method as well in which we balance the functional element, the mercury glass tube, instead of the whole thermostat. This method is also applied if the backplate is even but still the thermostat isn’t working properly. 

Check the wiring

The problem of inappropriate temperature adjustment by the thermostat may lie in the wiring inside the device. To check this, you can start by opening the access panel and then check that all the wires are attached to the appropriate terminals. If you don’t know much about it, use the manual to check the wiring diagram of the thermostat and fix it. In contrast, you can hire a technician as well to do the same if you’re unable to do so. 


A thermostat is one of the essential devices in any house and helps to adjust the temperature automatically. If we look at its working procedure, it detects the temperature level inside the house or any particular area and if it’s not according to the set point, it will start adjusting the warmth. Everything seems good until this point but sometimes the room temperature doesn’t match the thermostat setting–this is where the problems start. Well, this article is all about these issues and we have introduced you to their solutions. 

We have tried to cover all the related data to answer, why does my thermostat setting not match my home’s temperature? You must check some factors first including input power and surroundings before heading towards finding the actual problems. If these factors are fine, you must clean the thermostat, level it, and ensure to check its wiring. Well, if it’s still not working, then there are chances that you must replace the older one with a new thermostat. When buying, carefully check it and keep it in shadow away from sunlight during usage conditions.